[Stabilisation mécanique de métamatériaux fibreux imprimés en 3D par dépôt de filaments utilisant de nouvelles architectures de articulations]
Fibrous metamaterials derive their macroscopic mechanical response from the interplay between fiber deformation and hinge mechanics. This work introduces a novel printable hinge conception for filament-based additive manufacturing that is designed to behave as a perfect pivot and to improve structural stability under compression. Experiments on specimens subjected to bias-extension and compression tests show that the proposed hinges preserve the characteristic second-gradient response of fibrous metamaterials while contributing to delay the onset of transverse instability (qualitative evidence). The improved compressive behavior suggests potential applications in lightweight fibrous composite metamaterials requiring enhanced stability and deformation control. A second-gradient continuum model is calibrated against the experimental bias-extension response and used to perform finite element based numerical simulations. The resulting simulations reproduce the experimental force–displacement behavior with very good accuracy, supporting both the effectiveness of the proposed hinge design and the relevance of the adopted higher-order continuum description.
Les métamatériaux fibreux doivent leur réponse mécanique macroscopique à l’interaction entre la déformation des fibres et la mécanique des articulations. Ce travail présente un nouveau concept d’articulation imprimable en 3D destiné à la fabrication additive à base de filaments, conçu pour se comporter comme un pivot parfait et pour améliorer la stabilité structurelle sous compression. Des expériences menées sur des échantillons soumis à des essais de déformation sous contrainte et de compression montrent que les articulations proposées préservent la réponse caractéristique de second gradient des métamatériaux fibreux tout en contribuant à retarder l’apparition de l’instabilité transversale (preuve qualitative). L’amélioration du comportement en compression suggère des applications potentielles dans les métamatériaux composites fibreux légers nécessitant une stabilité et un contrôle de la déformation améliorés. Un modèle continu à second gradient est calibré par rapport à la réponse expérimentale en extension sous contrainte et utilisé pour réaliser des simulations numériques par éléments finis. Les simulations obtenues reproduisent le comportement force-déplacement expérimental avec une très bonne précision, confirmant à la fois l’efficacité de la conception du pivot proposée et la pertinence de la description continue d’ordre supérieur adoptée.
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Mots-clés : Métamatériaux pantographiques, Mécanique des articulations, Fabrication additive, Impression 3D à base de filaments, Théories des seconds gradients
Giulio Sanna 1 ; Mario Pistis 1 ; Victor Eremeyev 1 ; Salma Barboura 2 ; Mario Spagnuolo 1 , 3
CC-BY 4.0
Giulio Sanna; Mario Pistis; Victor Eremeyev; Salma Barboura; Mario Spagnuolo. Mechanical stabilization of filament-printed fibrous metamaterials via novel hinge architectures. Comptes Rendus. Mécanique, Volume 354 (2026), pp. 761-782. doi: 10.5802/crmeca.380
@article{CRMECA_2026__354_G1_761_0,
author = {Giulio Sanna and Mario Pistis and Victor Eremeyev and Salma Barboura and Mario Spagnuolo},
title = {Mechanical stabilization of filament-printed fibrous metamaterials via novel hinge architectures},
journal = {Comptes Rendus. M\'ecanique},
pages = {761--782},
year = {2026},
publisher = {Acad\'emie des sciences, Paris},
volume = {354},
doi = {10.5802/crmeca.380},
language = {en},
}
TY - JOUR AU - Giulio Sanna AU - Mario Pistis AU - Victor Eremeyev AU - Salma Barboura AU - Mario Spagnuolo TI - Mechanical stabilization of filament-printed fibrous metamaterials via novel hinge architectures JO - Comptes Rendus. Mécanique PY - 2026 SP - 761 EP - 782 VL - 354 PB - Académie des sciences, Paris DO - 10.5802/crmeca.380 LA - en ID - CRMECA_2026__354_G1_761_0 ER -
%0 Journal Article %A Giulio Sanna %A Mario Pistis %A Victor Eremeyev %A Salma Barboura %A Mario Spagnuolo %T Mechanical stabilization of filament-printed fibrous metamaterials via novel hinge architectures %J Comptes Rendus. Mécanique %D 2026 %P 761-782 %V 354 %I Académie des sciences, Paris %R 10.5802/crmeca.380 %G en %F CRMECA_2026__354_G1_761_0
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